Which of the following is one of the effective key lengths in 3DES?
A) 40 bits
B) 110 bits
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

3DES (Triple DES) effectively uses a 168-bit key length when using three distinct keys, but due to the meet-in-the-middle attack, its effective security is often considered to be 112 bits when using three distinct keys, and 56 bits when using two keys. Neither 40 bits nor 110 bits are considered effective key lengths for 3DES.

Which of the Following Is One of the Effective Key